Tri Sigma

1970	Beatles break up. Computer floppy disks introduced. Kent State shootings kill 4 students.
1971	London Bridge brought to the US. VCRs introduced.
1972	"MAS*H" premiers on TV. Mark Spitz wins 7 gold medals. Terrorists attack at the Olympic Games in Munich. Watergate scandal begins.
1973	Abortion legalized in US. Sears Tower built in Chicago.
1974	Patty Hearst kidnapped. President Richard Nixon resigns.
1975	Arthur Ashe becomes first black man to win Wimbledon. Microsoft is founded.
1976	Nadia Comaneci receives 7 perfect tens. North and South Vietnam join to form the Socialist Republic of Vietnam.
1977	Elvis found dead. Miniseries "Roots" airs.
1978	First test-tube baby born John Paul II becomes pope.
1979	Margaret Thatcher becomes first female prime minister of Great Britain. Mother Theresa awarded the Nobel Peace Prize. Sony introduces the Walkman.

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